NDLI: Relations between radiation characteristics of small antennas located in free space and close to lossy phantom

Content Provider	IEEE Xplore Digital Library
Author	Tavakol, V. Kildal, P.-S.
Copyright Year	2006
Description	Author affiliation: Bluetest AB, Gothenburg (Tavakol, V.)
Abstract	The characterization of small terminal antennas close to head phantoms and other lossy objects is time-consuming, and in particular if the radiation patterns are to be measured for many positions close to the phantom. The main effect of a lossy object is absorption and a corresponding reduction in the radiation efficiency of the antenna. For operation in multipath environments with Rayleigh fading the radiation efficiency is the most significant performance parameter; the radiation pattern plays a minor role. Therefore, characterization could be based on only the radiation efficiency, which can be measured fast and accurately in e.g. a reverberation chamber. It has been proposed (and is also practiced some places) to determine the absorption in the head phantom and the corresponding radiation efficiency by simply using the free space radiation pattern to calculate the relative power shadowed by the phantom. The purpose of the present work is to investigate the relevance and accuracy of such an approach, compared to an actual measurement of radiation efficiency
Sponsorship	Motorola Air Force Office of Sci. Res. ANSOFT
Starting Page	2037
Ending Page	2040
File Size	253549
Page Count	4
File Format	PDF
ISBN	1424401232
DOI	10.1109/APS.2006.1710980
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-07-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Imaging phantoms Antenna measurements Antenna radiation patterns Space technology Antennas and propagation Loss measurement Dielectric losses Directive antennas Power measurement Reverberation chamber
Content Type	Text
Resource Type	Article

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